Update to Rust 1.98

.github/workflows/main.yml

@@ -15,8 +15,8 @@ jobs:
     - name: Install Rust
       run: |
         rustup set profile minimal
-        rustup toolchain install 1.97 -c rust-docs
-        rustup default 1.97
+        rustup toolchain install 1.98 -c rust-docs
+        rustup default 1.98
     - name: Install mdbook
       run: |
         mkdir bin
@@ -50,8 +50,8 @@ jobs:
     - name: Install Rust
       run: |
         rustup set profile minimal
-        rustup toolchain install 1.97 -c rust-docs
-        rustup default 1.97
+        rustup toolchain install 1.98 -c rust-docs
+        rustup default 1.98
     - name: Run `tools` package tests
       run: |
         cargo test

listings/ch02-guessing-game-tutorial/listing-02-04/output.txt

@@ -1,8 +1,8 @@
 $ cargo build
    Compiling libc v0.2.186
    Compiling rand_core v0.10.1
-   Compiling getrandom v0.4.3
    Compiling cfg-if v1.0.0
+   Compiling getrandom v0.4.3
    Compiling chacha20 v0.10.1
    Compiling rand v0.10.1
    Compiling guessing_game v0.1.0 (file:///projects/guessing_game)
@@ -17,7 +17,7 @@ error[E0308]: mismatched types
    = note: expected reference `&String`
               found reference `&{integer}`
 note: method defined here
-  --> /rustc/2d8144b7880597b6e6d3dfd63a9a9efae3f533d3/library/core/src/cmp.rs:1000:7
+  --> /rustc/88d9e12ae178fab0fb5cc050a94da85685d449ea/library/core/src/cmp.rs:1000:7
 
 For more information about this error, try `rustc --explain E0308`.
 error: could not compile `guessing_game` (bin "guessing_game") due to 1 previous error

listings/ch03-common-programming-concepts/no-listing-19-statements-vs-expressions/output.txt

@@ -18,7 +18,7 @@ warning: unnecessary parentheses around assigned value
 help: remove these parentheses
   |
 2 -     let x = (let y = 6);
-2 +     let x = let y = 6 ;
+2 +     let x = let y = 6;
   |
 
 warning: `functions` (bin "functions") generated 1 warning

listings/ch05-using-structs-to-structure-related-data/output-only-01-debug/output.txt

@@ -9,7 +9,6 @@ error[E0277]: `Rectangle` doesn't implement `Debug`
    |                        required by this formatting parameter
    |
    = help: the trait `Debug` is not implemented for `Rectangle`
-   = note: add `#[derive(Debug)]` to `Rectangle` or manually `impl Debug for Rectangle`
 help: consider annotating `Rectangle` with `#[derive(Debug)]`
    |
  1 + #[derive(Debug)]

listings/ch06-enums-and-pattern-matching/no-listing-07-cant-use-option-directly/output.txt

@@ -8,19 +8,19 @@ error[E0277]: cannot add `Option<i8>` to `i8`
   |
   = help: the trait `Add<Option<i8>>` is not implemented for `i8`
 help: the following other types implement trait `Add<Rhs>`
- --> /rustc/2d8144b7880597b6e6d3dfd63a9a9efae3f533d3/library/core/src/ops/arith.rs:98:8
+ --> /rustc/88d9e12ae178fab0fb5cc050a94da85685d449ea/library/core/src/ops/arith.rs:98:8
   |
   = note: `i8` implements `Add`
- ::: /rustc/2d8144b7880597b6e6d3dfd63a9a9efae3f533d3/library/core/src/ops/arith.rs:113:0
+ ::: /rustc/88d9e12ae178fab0fb5cc050a94da85685d449ea/library/core/src/ops/arith.rs:113:0
   |
   = note: in this macro invocation
- --> /rustc/2d8144b7880597b6e6d3dfd63a9a9efae3f533d3/library/core/src/internal_macros.rs:22:8
+ --> /rustc/88d9e12ae178fab0fb5cc050a94da85685d449ea/library/core/src/internal_macros.rs:22:8
   |
   = note: `&i8` implements `Add<i8>`
- ::: /rustc/2d8144b7880597b6e6d3dfd63a9a9efae3f533d3/library/core/src/internal_macros.rs:33:8
+ ::: /rustc/88d9e12ae178fab0fb5cc050a94da85685d449ea/library/core/src/internal_macros.rs:33:8
   |
   = note: `i8` implements `Add<&i8>`
- ::: /rustc/2d8144b7880597b6e6d3dfd63a9a9efae3f533d3/library/core/src/internal_macros.rs:44:8
+ ::: /rustc/88d9e12ae178fab0fb5cc050a94da85685d449ea/library/core/src/internal_macros.rs:44:8
   |
   = note: `&i8` implements `Add`
   = note: this error originates in the macro `add_impl` (in Nightly builds, run with -Z macro-backtrace for more info)

listings/ch06-enums-and-pattern-matching/no-listing-10-non-exhaustive-match/output.txt

@@ -7,8 +7,8 @@ error[E0004]: non-exhaustive patterns: `None` not covered
   |               ^ pattern `None` not covered
   |
 note: `Option<i32>` defined here
- --> /rustc/2d8144b7880597b6e6d3dfd63a9a9efae3f533d3/library/core/src/option.rs:597:0
- ::: /rustc/2d8144b7880597b6e6d3dfd63a9a9efae3f533d3/library/core/src/option.rs:601:4
+ --> /rustc/88d9e12ae178fab0fb5cc050a94da85685d449ea/library/core/src/option.rs:598:0
+ ::: /rustc/88d9e12ae178fab0fb5cc050a94da85685d449ea/library/core/src/option.rs:602:4
   |
   = note: not covered
   = note: the matched value is of type `Option<i32>`

listings/ch08-common-collections/listing-08-19/output.txt

@@ -10,10 +10,10 @@ error[E0277]: the type `str` cannot be indexed by `{integer}`
   = note: you can use `.chars().nth()` or `.bytes().nth()`
           for more information, see chapter 8 in The Book: <https://doc.rust-lang.org/book/ch08-02-strings.html#indexing-into-strings>
 help: `usize` implements trait `SliceIndex<T>`
- --> /rustc/2d8144b7880597b6e6d3dfd63a9a9efae3f533d3/library/core/src/slice/index.rs:214:0
+ --> /rustc/88d9e12ae178fab0fb5cc050a94da85685d449ea/library/core/src/slice/index.rs:179:0
   |
   = note: `SliceIndex<[T]>`
- --> /rustc/2d8144b7880597b6e6d3dfd63a9a9efae3f533d3/library/core/src/bstr/traits.rs:197:0
+ --> /rustc/88d9e12ae178fab0fb5cc050a94da85685d449ea/library/core/src/bstr/traits.rs:197:0
   |
   = note: `SliceIndex<ByteStr>`
   = note: required for `String` to implement `Index<{integer}>`

listings/ch13-functional-features/listing-13-08/output.txt

@@ -14,7 +14,7 @@ error[E0507]: cannot move out of `value`, a captured variable in an `FnMut` clos
    |                              ^^^^^ `value` is moved here
    |
 help: `Fn` and `FnMut` closures require captured values to be able to be consumed multiple times, but `FnOnce` closures may consume them only once
-  --> /rustc/2d8144b7880597b6e6d3dfd63a9a9efae3f533d3/library/alloc/src/slice.rs:249:11
+  --> /rustc/88d9e12ae178fab0fb5cc050a94da85685d449ea/library/alloc/src/slice.rs:249:11
 help: consider cloning the value if the performance cost is acceptable
    |
 18 |         sort_operations.push(value.clone());

listings/ch16-fearless-concurrency/listing-16-14/output.txt

@@ -22,7 +22,7 @@ note: required because it's used within this closure
 11 |         let handle = thread::spawn(move || {
    |                                    ^^^^^^^
 note: required by a bound in `spawn`
-  --> /rustc/2d8144b7880597b6e6d3dfd63a9a9efae3f533d3/library/std/src/thread/functions.rs:125:0
+  --> /rustc/88d9e12ae178fab0fb5cc050a94da85685d449ea/library/std/src/thread/functions.rs:125:0
 
 For more information about this error, try `rustc --explain E0277`.
 error: could not compile `shared-state` (bin "shared-state") due to 1 previous error

listings/ch21-web-server/listing-21-22/output.txt

@@ -9,7 +9,7 @@ error[E0507]: cannot move out of `worker.thread` which is behind a mutable refer
    |             move occurs because `worker.thread` has type `JoinHandle<()>`, which does not implement the `Copy` trait
    |
 note: `JoinHandle::<T>::join` takes ownership of the receiver `self`, which moves `worker.thread`
-  --> /rustc/2d8144b7880597b6e6d3dfd63a9a9efae3f533d3/library/std/src/thread/join_handle.rs:149:16
+  --> /rustc/88d9e12ae178fab0fb5cc050a94da85685d449ea/library/std/src/thread/join_handle.rs:149:16
 
 For more information about this error, try `rustc --explain E0507`.
 error: could not compile `hello` (lib) due to 1 previous error

rust-toolchain

@@ -1 +1 @@
-1.97
+1.98

src/title-page.md

@@ -3,7 +3,7 @@
 _by Steve Klabnik, Carol Nichols, and Chris Krycho, with contributions from the
 Rust Community_
 
-This version of the text assumes you’re using Rust 1.97.0 (released 2026-07-09)
+This version of the text assumes you’re using Rust 1.98.0 (released 2026-08-20)
 or later with `edition = "2024"` in the *Cargo.toml* file of all projects to
 configure them to use Rust 2024 Edition idioms. See the [“Installation” section
 of Chapter 1][install]<!-- ignore --> for instructions on installing or